COMPREHENSIVE SCREWDRIVER SET: 73-piece ratchet wrench and screwdriver set for easily tightening and loosening fasteners; includes magnetic bits for electric appliances and non-magnetic precision bits for small electronic instruments like watches, smartphones and glasses THREE-WAY RATCHET FUNCTION: Driver features clockwise and anti-clockwise ratcheting plus fixed locked position; free-spinning base allows for turning the handle while maintaining consistent pressure HEAT-TREATED CHROME VANADIUM: Made of chrome vanadium steel that has been heat treated for hardness; corrosion-resistant finish for added strength; non-slip handle provides a comfortable, secure grip ORGANISED STORAGE CASE: Plastic storage case included with dedicated space for the driver, sockets and bits; PRECISION BIT GUIDANCE: Do not use precision screwdriver bits on oversized screws which need large torque force; precision bits are only suitable for small electronic devices, Weight: 1.38 pounds, Manufacturer: Amazon